The series is set in Universal Century year 0079 in the jungles of Southeast Asia. The Earth Federation and the Principality of Zeon are fighting a brutal guerrilla war for control of the area and its resources. Zeon’s best hope for victory in the region rests with an experimental mobile armor and its pilot, Aina Sahalin. Meanwhile the Earth Federal Army, which has been fighting the Zeon in the region, receive reinforcements in the form of Ensign Shiro Amada, newly named commander of the 08th MS Team. Aina and Shiro know each other from a mutual rescue in space, but when Shiro discovers that Aina is in fact the pilot of the Zeon mobile armor he is arrested for treason.